"Toi et moi" is French for You and Me. The song was used as the ending theme to the Japanese version of the second Pokémon movie, Revelation Lugia. Although she had already experimented with urban music in the past, this single is considered as her first real attempt at it. Despite that, this is her first single to have a more urban sound, and her step-away from dance-pop to urban-pop.
Toi et Moi debut at #3 with 121,970 copies sold in its first week and it sold 272,110 copies. It charted for 11 weeks. Toi et Moi was the 85th best-selling of 1999. It was certified gold for 200,000 copies shipped.